Full Description

Accelerated Transient Response

Transient Response is paramount when it comes to amplification design. By selecting the appropriate transistors with high slew rates, the speed that electricity is served to the woofer cone improves dramatically. It takes a lot of electric energy via the current and voltage to propel a woofer cone to match the bass beat as its triggered. The ATR (accelerated transient response) technology is designed to improve the speed of the pulse, giving your amp the fast response it needs to provide a thick, pulsing low-end. It works by modulating the power supply rails with only the peak of the input signal, instead of operating continuously like most other power amps. This design provides more dynamic punch and improved efficiency, resulting in a cooler running unit because it doesn't require heavy heat sinks.

Exceptional Audio Quality

The EPQ304 was built with audio professionals in mind, delivering a lightweight yet powerful amplification system that doesn't compromise on functionality. The amplifier features an array of professional components designed to offer the highest quality audio possible. The ultra-low noise switch-mode power supply delivers noise-free audio and superior transient response, resulting in lower power consumption. There are also independent limiters for each channel offering high volume levels with reliable overload protection. Monitoring is provided by the Precise Power, Signal and Clip LEDs, allowing you to easily check your levels on the fly. Detented gain controls have also been featured for precise setting and matching of sensitivity, giving you even more control over the output level.

Features

• 4 x 75 Watts into 4 Ohms; 4 x 50 Watts into 8 Ohms
• ATR (Accelerated Transient Response) technology for ultimate punch and clarity
• Ultra-light, ultra-low noise and ultra-efficient switch-mode power supply for noise-free audio, superior transient response and low power consumption
• Independent limiters for each channel offer maximum output level with reliable overload protection
• Detented gain controls for precise setting and matching of sensitivity
• Precise Power, Signal and Clip LEDs to monitor performance
• Servo-balanced XLR and 1/4" TRS inputs plus professional speaker connectors
• Independent DC and thermal overload protection on each channel automatically protects amplifier and speakers without shutting down the show
• “Back-to-front” ventilation system including air filter for reliable operation
• "Built-like-a-tank", impact-resistant and all-steel 1U rackmount chassis
• Minimum depth chassis (10.1" / 257 mm) and ultra-light weight design (8.8 lbs / 4.0 kg) fits into compact, inexpensive effects racks
• High-quality components and exceptionally rugged construction ensure long life

Specifications

• Peak
  • Stereo: All Channels Driven
    • 4Ω / 1kHz: 75 W
    • 8Ω / 1kHz: 50 W
  • Bridged Mono: 2 Pairs Of Channels Bridged
    • 8Ω / 1kHz: 150 W
• RMS
  • Stereo: All Channels Driven
    • 4Ω / 1kHz @ 1 Percent THD: 65 W
    • 8Ω / 1kHz @ 1 Percent THD: 40 W
  • Bridged Mono: 2 Pairs Of Channels Bridged
    • 8Ω / 1kHz @ 1 Percent THD: 130 W
• Controls
  • Front: Power Switch, Gain Controls (Channels 1, 2, 3, 4)
  • Rear: Mode Switch (Mono, Stereo, Bridge)
• Indicators
  • Power: Blue LED
  • Limit (Per Channel): Blue LED
  • Signal (Per Channel): White LED (-20 dB, -10 dB, 0 dB)
• Circuit
  • Inputs: 4 x XLR 1/4'' TRS Combo Jacks
  • Input Sensitivity: 0 dBu
  • Input Impedance: 10kΩ Unbalanced, 20kΩ Balanced
  • Outputs: 4 x Locking-Style Professional Speaker Connectors
  • Output Circuit Type: Class D
  • Distortion: < 0.3 Percent
  • Frequency Response: 20Hz - 20kHz, +0 / -1 dB
  • Voltage Gain: 28 dB
  • Damping Factor: > 80 @ 8Ω
  • Signal-To-Noise: 100 dB
• Circuit Protection
  • Cooling: Continuously Variable Speed Fan, Right-to-Left Air Flow
  • Amplifier Protection: Full Short-Circuit, Overcurrent, DC Protection, Thermal Protection
  • Load Protection: On/Off Muting, DC Fault Power Supply Shut Down
• Power Supply
  • USA/Canada: 120V, 60Hz
  • UK/Australia: 240V, 50Hz
  • Europe: 230V, 50Hz
  • China: 220V, 50Hz
  • Japan: 100V, 50/60Hz
• Power Consumption: 380W
• Mains Connector: Standard IEC Receptacle
• Weight: 4 kg
• Dimensions
  • Height: 49 mm
  • Width: 482 mm
  • Depth: 265 mm